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Articles:

Horwat, D., JIMENEZ-PIQUE, E., Pierson, J. F., Migot, S., Dehmas, M. and Anglada, M.
Journal of Physics and Chemistry of solids, 73(4):554-558
2012
ISSN: 0022-3697

Resume: Zr1-xWx nanocrystalline films of Zr-W solid solutions and ZrW2 Laves phase were synthesized by magnetron co-sputtering. Large values of the H/E ratio up to 0.09 are observed for grain sizes in the nanometer range along with a hardness above 10 GPa and Young's modulus below 230 GPa. H/E values are correlated with the developed surface of grain boundaries suggesting an elastic deformation mostly handled by the grain boundaries. This is associated to friction coefficients comparable to those of metallic glass surfaces. In contrast to fragile bulk Laves phases, no cracks were detected at the film surface after indentation and scratch test of nanocrystalline ZrW2. The friction coefficient of such films against diamond tip was in the range 0.08-0.15, similarly to metallic glass surfaces. (C) 2011 Elsevier Ltd. All rights reserved.

Equipe: Département SI2M : Microstructures et Contraintes

Horwat, D., JIMENEZ-PIQUE, E., Pierson, J.F., Migot, S., Dehmas, M. and Anglada, M.
Journal of Physics and Chemistry of Solids, 73:554-558
2012

Equipe: Département CP2S : Elaboration et Fonctionnalité de Couches Minces

HEJTMANEK, J., KNIZEK, K., MARYSKO, M., JIRAK, Z., SEDMIDUBSKY, D., JANKOVSKY, O., HUBER, S., MASSCHELEIN, P. and LENOIR, B.
Journal of Applied Physics, 111:07D715
2012

Equipe: Département CP2S : Matériaux à propriétés thermoélectriques

Cvelbar, U., Modic, M., Kovac, J., Junkar, I., Eleršic, K., Lazovic, S., Brühl, S.P., Vujoševic, D., Canal, C., Belmonte, T. and Mozetic, M.
Surface and Coatings Technology, (accepted)
2012

Equipe: Département CP2S : Expériences et Simulations des Plasmas Réactifs - Interaction plasma-surface et Traitement des Surfaces ESPRITS

Briquet, L.G.V., Jana, A, Mether, L., Nordlund, K., Henrion, G., Philipp, P. and WIRTZ, T.
J. Phys. Cond. Mat., 24:395004 (13 pp)
2012

Resume: In this paper a new interatomic potential based on the Kieffer force field and designed to perform molecular dynamics (MD) simulations of carbon eposition on silicon surfaces is implemented. This potential is a third-order reactive force field that includes a dynamic charge transfer and allows for the formation and breaking of bonds. The parameters for Si-C and C-C interactions are optimized using a genetic algorithm. The quality of the potential is tested on its ability to model silicon carbide and diamond physical properties as well as the formation energies of point defects. Furthermore, MD simulations of carbon deposition on reconstructed (100) silicon surfaces are carried out and compared to similar simulations using a Tersoff-like bond order potential. Simulations with both potentials produce similar results showing the ability to extend the use of the Kieffer potential to deposition studies. The investigation reveals the presence of a channelling effect when depositing the carbon at 45 incidence angle. This effect is due to channels running in directions symmetrically equivalent to the (110) direction. The channelling is observed to a lesser extent for carbon atoms with 30 and 60 incidence angles relative to the surface normal. On a pristine silicon surface, sticking coefficients were found to vary between 100 and 73%, depending on deposition conditions.

Equipe: Département CP2S : Expériences et Simulations des Plasmas Réactifs - Interaction plasma-surface et Traitement des Surfaces ESPRITS

JOUDI-BAHRI, I., LECOMTE, A., OUEZDOU, M. BEN and ACHOUR, T.
Cement and Concrete Composites, 34(6):771-780
2012

Equipe: Département CP2S : Matériaux pour le Génie Civil

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